drivers/rtc/rtc-test.c


1
2
3
4
5

 * DECLARE_COMPLETION - declare and initialize a completion structure
 * @work:  identifier for the completion structure
 *
 * This macro declares and initializes a completion structure. Generally used
 * for static declarations. You should use the _ONSTACK variant for automatic
 * variables.
 */
#define DECLARE_COMPLETION(work) \
	struct completion work = COMPLETION_INITIALIZER(work)

/*
 * Lockdep needs to run a non-constant initializer for on-stack
 * completions - so we use the _ONSTACK() variant for those that
 * are on the kernel stack:
 */
/**
 * DECLARE_COMPLETION_ONSTACK - declare and initialize a completion structure
 * @work:  identifier for the completion structure
 *
 * This macro declares and initializes a completion structure on the kernel
 * stack.
 */
#ifdef CONFIG_LOCKDEP
# define DECLARE_COMPLETION_ONSTACK(work) \
	struct completion work = COMPLETION_INITIALIZER_ONSTACK(work)
#else
# define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work)
#endif

/**
 * init_completion - Initialize a dynamically allocated completion
 * @x:  completion structure that is to be initialized
 *
 * This inline function will initialize a dynamically created completion
 * structure.
 */
static inline void init_completion(struct completion *x)
{
	x->done = 0;
	init_waitqueue_head(&x->wait);
}

extern void wait_for_completion(struct completion *);
extern int wait_for_completion_interruptible(struct completion *x);
extern int wait_for_completion_killable(struct completion *x);
extern unsigned long wait_for_completion_timeout(struct completion *x,
						   unsigned long timeout);
extern long wait_for_completion_interruptible_timeout(
	struct completion *x, unsigned long timeout);
extern long wait_for_completion_killable_timeout(
	struct completion *x, unsigned long timeout);
extern bool try_wait_for_completion(struct completion *x);
extern bool completion_done(struct completion *x);

extern void complete(struct completion *);
extern void complete_all(struct completion *);

/**
 * INIT_COMPLETION - reinitialize a completion structure
 * @x:  completion structure to be reinitialized
 *
 * This macro should be used to reinitialize a completion structure so it can
 * be reused. This is especially important after complete_all() is used.
 */
#define INIT_COMPLETION(x)	((x).done = 0)


#endif
/*
 * An RTC test device/driver
 * Copyright (C) 2005 Tower Technologies
 * Author: Alessandro Zummo <a.zummo@towertech.it>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/err.h>
#include <linux/rtc.h>
#include <linux/platform_device.h>

static struct platform_device *test0 = NULL, *test1 = NULL;

static int test_rtc_read_alarm(struct device *dev,
	struct rtc_wkalrm *alrm)
{
	return 0;
}

static int test_rtc_set_alarm(struct device *dev,
	struct rtc_wkalrm *alrm)
{
	return 0;
}

static int test_rtc_read_time(struct device *dev,
	struct rtc_time *tm)
{
	rtc_time_to_tm(get_seconds(), tm);
	return 0;
}

static int test_rtc_set_mmss(struct device *dev, unsigned long secs)
{
	dev_info(dev, "%s, secs = %lu\n", __func__, secs);
	return 0;
}

static int test_rtc_proc(struct device *dev, struct seq_file *seq)
{
	struct platform_device *plat_dev = to_platform_device(dev);

	seq_printf(seq, "test\t\t: yes\n");
	seq_printf(seq, "id\t\t: %d\n", plat_dev->id);

	return 0;
}

static int test_rtc_ioctl(struct device *dev, unsigned int cmd,
	unsigned long arg)
{
	/* We do support interrupts, they're generated
	 * using the sysfs interface.
	 */
	switch (cmd) {
	case RTC_PIE_ON:
	case RTC_PIE_OFF:
	case RTC_UIE_ON:
	case RTC_UIE_OFF:
	case RTC_AIE_ON:
	case RTC_AIE_OFF:
		return 0;

	default:
		return -ENOIOCTLCMD;
	}
}

static const struct rtc_class_ops test_rtc_ops = {
	.proc = test_rtc_proc,
	.read_time = test_rtc_read_time,
	.read_alarm = test_rtc_read_alarm,
	.set_alarm = test_rtc_set_alarm,
	.set_mmss = test_rtc_set_mmss,
	.ioctl = test_rtc_ioctl,
};

static ssize_t test_irq_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	return sprintf(buf, "%d\n", 42);
}
static ssize_t test_irq_store(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
	int retval;
	struct platform_device *plat_dev = to_platform_device(dev);
	struct rtc_device *rtc = platform_get_drvdata(plat_dev);

	retval = count;
	if (strncmp(buf, "tick", 4) == 0)
		rtc_update_irq(rtc, 1, RTC_PF | RTC_IRQF);
	else if (strncmp(buf, "alarm", 5) == 0)
		rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF);
	else if (strncmp(buf, "update", 6) == 0)
		rtc_update_irq(rtc, 1, RTC_UF | RTC_IRQF);
	else
		retval = -EINVAL;

	return retval;
}
static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store);

static int test_probe(struct platform_device *plat_dev)
{
	int err;
	struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev,
						&test_rtc_ops, THIS_MODULE);
	if (IS_ERR(rtc)) {
		err = PTR_ERR(rtc);
		return err;
	}

	err = device_create_file(&plat_dev->dev, &dev_attr_irq);
	if (err)
		goto err;

	platform_set_drvdata(plat_dev, rtc);

	return 0;

err:
	rtc_device_unregister(rtc);
	return err;
}

static int __devexit test_remove(struct platform_device *plat_dev)
{
	struct rtc_device *rtc = platform_get_drvdata(plat_dev);

	rtc_device_unregister(rtc);
	device_remove_file(&plat_dev->dev, &dev_attr_irq);

	return 0;
}

static struct platform_driver test_driver = {
	.probe	= test_probe,
	.remove = __devexit_p(test_remove),
	.driver = {
		.name = "rtc-test",
		.owner = THIS_MODULE,
	},
};

static int __init test_init(void)
{
	int err;

	if ((err = platform_driver_register(&test_driver)))
		return err;

	if ((test0 = platform_device_alloc("rtc-test", 0)) == NULL) {
		err = -ENOMEM;
		goto exit_driver_unregister;
	}

	if ((test1 = platform_device_alloc("rtc-test", 1)) == NULL) {
		err = -ENOMEM;
		goto exit_free_test0;
	}

	if ((err = platform_device_add(test0)))
		goto exit_free_test1;

	if ((err = platform_device_add(test1)))
		goto exit_device_unregister;

	return 0;

exit_device_unregister:
	platform_device_unregister(test0);

exit_free_test1:
	platform_device_put(test1);

exit_free_test0:
	platform_device_put(test0);

exit_driver_unregister:
	platform_driver_unregister(&test_driver);
	return err;
}

static void __exit test_exit(void)
{
	platform_device_unregister(test0);
	platform_device_unregister(test1);
	platform_driver_unregister(&test_driver);
}

MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
MODULE_DESCRIPTION("RTC test driver/device");
MODULE_LICENSE("GPL");

module_init(test_init);
module_exit(test_exit);